3160 Number on Balance 32-35 lbs Sash Wt. 60-3160

3150 Number on Window Balance. 32" Length of Metal Channel. 28-32 lbs Sash Weight. Also a replacement for old balances stamped 3190 BSI. 1/2" x 1/2" non-tilt window balance.
***Note: Top and bottom balance ends must be ordered separately. We strongly suggest replacing the sash guides on the side of your window as well.